NapCat MCP Server

An MCP server that encapsulates all NapCat HTTP APIs, supporting both HTTP and WebSocket modes.

Based on the napcat-group-info-mcp extension, adding full API support for message sending, group management, friend management, system management, and more.

Features

• 📋 Group chat information retrieval (read-only)

• 👥 Group member information retrieval (read-only)

• 📁 Group file management (read/write)

• 💬 Message sending and management

• 📢 Group announcement management

• ⭐ Group essence message management

• 👤 Friend/user management

• 🔧 Group management operations (kick, ban, admin, etc.)

• 🖥️ System management (login info, status, etc.)

• 🎨 Napcat extended functions (OCR, images, voice, etc.)

• 🔒 Supports group ID access restrictions

• 🔐 Supports read-only mode

• 🌐 Supports both HTTP and WebSocket modes

Related MCP server: Xadeus-QQ-MCP

Installation

git clone https://github.com/1021143806/napcat_mcp.git
cd napcat_mcp
pip install -e .

Configuration

Add to your MCP client configuration file:

{
  "mcpServers": {
    "napcat-mcp": {
      "command": "python",
      "args": ["path/to/run_direct.py"],
      "env": {
        "NAPCAT_HOST": "http://localhost:3000",
        "NAPCAT_TOKEN": "your_token_here",
        "ALLOWED_GROUPS": "",
        "READONLY_MODE": "false"
      }
    }
  }
}

Environment Variables

Connection Modes

Automatically selected based on the NAPCAT_HOST prefix:

• http:// or https:// → HTTP mode

• ws:// or wss:// → WebSocket mode

Security Features

Group ID Access Restrictions

ALLOWED_GROUPS=                    # 允许所有群
ALLOWED_GROUPS=628101497           # 只允许单个群
ALLOWED_GROUPS=628101497,123456789 # 允许多个群

Read-only Mode

READONLY_MODE=true                 # 禁用所有写入操作

Available Tools (55)

Group Chat Information (16)

get_group_info get_group_info_ex get_group_list get_group_honor_info get_group_at_all_remain get_group_member_list get_group_member_info get_group_root_files get_group_files_by_folder get_group_file_system_info get_group_file_url get_group_msg_history get_group_announcement_list get_essence_msg_list get_group_system_msg get_group_ignore_add_request

Message Sending and Management (8)

send_msg send_group_msg send_private_msg delete_msg get_msg get_forward_msg send_group_forward_msg mark_msg_as_read

Group Management (13)

set_group_kick set_group_ban set_group_whole_ban set_group_admin set_group_card set_group_name set_group_leave set_group_special_title set_group_add_request upload_group_file delete_group_file send_group_notice set_essence_msg delete_essence_msg

Friend/User (5)

get_friend_list get_stranger_info get_friend_msg_history send_like set_friend_add_request

System Management (6)

get_login_info get_status get_version_info get_cookies get_csrf_token get_credentials

Napcat Extensions (7)

ocr_image get_image get_record can_send_image can_send_record get_online_client set_qq_profile

NapCat Configuration

Ensure that the HTTP server is enabled in NapCat's OneBot11 configuration:

{
  "network": {
    "httpServers": [{
      "enable": true,
      "name": "napcat mcp",
      "host": "127.0.0.1",
      "port": 3000,
      "enableCors": true,
      "enableWebsocket": true,
      "messagePostFormat": "array",
      "token": "your_token_here",
      "debug": false
    }]
  }
}

Technical Details

• Based on the OneBot11 standard

• Compatible with NapCat 4.9.91+

• HTTP mode uses httpx asynchronous client

• WebSocket mode uses websockets library

• Uses Pydantic for parameter validation

License

AGPL-3.0